Julius pathe



UNITED STATES PATENT OFFICE.

JULIUS PATHE, OF BERLIN, PRUSSIA, GERMANY.

METHOD OF TREATING HORN SHAVINGS.

SPECIFICATION forming part of Letters Patent No. 243,963, dated July 5, 1881. Application filed June 2, 1881. (N0 specimens.)

To all whom it may concern:

Be it known that I, J ULIUs PATHE, of Berlin, Prussia, German Empire, have invented a new and useful Improvement in the Method of Treating Horn Shavings, of which the following is a specification.

The horn shavings are soaked one hour in a solution made by dissolving boracic acid in cold water until the water will receive no more, and in a cold solution of arsenious acid and diluted muriatic acid, 1.1 specific gravity. These two solutions may be mixed if desired, but I prefer to take twice as much boracic-acid solution as arsenious-acid solution. The solution which contains the now swelled horn substances is then put into a water bath for an hour, which is kept at a temperature of 60 Celsius. The horn substance is now placedin iron forms and heated up to 120 Celsius. It is strongly compressed at the same time, and treated thus until all liquid has passed oft. When the mass has become cool the horn shavings will be found to have united in one solid mass, which can be cut and worked like original horn.

Several sheets of horn can be thus pressed in one form if they are divided by tinned steel plates.

The material produced by this process is insoluble in water and alcohol and possesses great elasticity and toughness. It can be carved, turned, out, &c., stained, polished, and molded by pressing.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The treatment of horn shavings with a solution of boracic acid and arsenious acid, first cold and then warm, substantially as herein described.

2. Heating the swelled horn shavings up to 120 Celsius after having treated them with boracic acid and arsenious acid, substantially as herein described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JULIUS PATHE.

WVitnesses:

WILHELM 'LEHMANN, BERTHOLD ROI. 

